Improvement in clamps for elevating well-tubes



i uit. 5mm

Mm a fr i atiri Leners Patent No. 87,097, daanebwwry 23, 1869.

-IMPROVEMENT IN CLAMPS FOR ELEVATING- WELL-TUBES.

The Schedule refenred to in these Letters Patent and making part of thesame.

To all whom it may conce/rn:

Be it known that I, DANIEL FISHER, of Oil City, in the county ofVenango, and State of Pennsylvania, have invented a new and usefulCombined Clamp and Drawer for Well-Tubing; and I do hereby declare thefollowing to be a full, clear, and exact description thereof,referenceybeing had to the accompanying drawings, which are made apartlof lthis specification.

The subject of nry invention is a novel and simple device forfacilitating the construction of tube-wells, combining the function ofthe clamp and drawer (two separate appliances) now employed.

It consists, essentially, of a hinged clamp, adapted to grasp the tubeunder its thimble or sleeve, and having attached to it a pair of linksfor its attachment to the rope of the elevating or lowering-apparatus,said links, when in the position in which they are held by theirattachment to said suspending-rope, also serving to lock the clamp inits closed condition. One -ofthe links is provided with a set-screw, byvwhich it is adapted to be held in its uprightposition when detached fromthe rope, in order to maintain the clamp in its closed condition whilecoupling and uncoupling tubes.

In the drawingsl Figure 1 is a perspective view of the device in an openand detached condition.

Figure 2 is an elevation thereof', partly in section, illustrating themanner of applying it to the tubing.

A A may represent the two jaws which constitute the clamp, and which mayhe made of malleable iron, or other suitable material, of .substantiallythe form represented in iig. l, and hereinafter more particularlyreferred to.

B B are the suspending-links, which are preferably of curved form, toenable them to meet over the end of the tubing, as represented in fig.2, where the tuhing is shown in red. They may he made of wroughtiron inthe usual manner.

They are connected to the' clamp by means of the holes a af, in thelower edge of the jaw A, and when in their elevated position, embracethe sides of both jaws, and'hold them tightly in their closed position,thus forming a strong, simple, and very secure. fastenmg.

A set-screw, O, passing through an enlargement, b, of the link B, adaptssaid link to be held in an elevated position, so as to lock the clampwhen it is detached from the rope, as in coupling and uncoupling thetubes.

The jaws A A are each made with a semi-tubular portion, M, to enablethem conjointly, to encircle the tube, and with handles ai, by which tohold the tube from turning while another is being screwed'on.

The upper edge, a, ofthe portion (4*, is made straight part, asrepresented, the hinge being composed of the perforated lugs a, 6*5,cast on the jaws A and A respectively, and united by a set-screw, D,provided with the customary angular head d, and taking into acorrespondngly-threaded socket in the lug a of the jaw A, the objectbeing to form a secure and tight hinge, without extending the pintleentirely through the hin e.

Ihejaw A is recessed at a3 and a4 for the reception of the link B andthe bossa5 of A.

E represents the rope of the elevating or loweringy apparatus, and F,the customary swivel-hook attached thereto.

G represents the tube, and H, the thimble or sleeve screwed on the endof the tube G` to form thecouplin 'Ihe operation of the device ris asfollows:

'lwo clamps, such as described, being used, as with vthe ordinaryscrew-swivel drawer, a length of tubing being attached, as representedin g. 2, its end is inserted in the hole, and it is lowered until theclamp rests on the blocks at the surface of the ground.

The hook F is then removed from the links of this clamp, andthe secondone,with anotherlength of tubing, is attached and elevated, and itslower end is screwed into the thimble H of the first. An operatormeanwhile grasps the handle a*F1 of the clamp, and holds the tube fromrotation while the other is being screwed in, the clam-p being heldclosed by the link B, supported in its upright position by the screw G.The tubing, when the coupling is made, is raised a little, and the lowerclamp removed, when ,it is again lowered until the second clamp rests onthe stop,- when athird length of tubing, supported by means of the rstclamp, is attached in like manner, and so on. g

In 'removing tubing, the operation is substantially similar, andrequires no ,further description.

The precise form of parts and combination of features shown' anddescribed, is not essentialto the operation of the individual parts, andmay be modified as found preferable in practice.

Having thus described my invention, the following is what I claim asn'ew therein, and desireto secure by Letters Patent:

l. I claim a combined tubing-,drawer and clamp, ,ccnsisting of thehinged jaws A A and suspending-links B B', adapted to operatesubstantially as herein described.

2. In combination with the aforesaid jaws A A .and links B B', I furtherclaim the clamping-screw O, employed substantially as and for thepurpose set forth.

3. I claim the pintle D d, constructed and applied substantially in themanner described, for the purpose specified.

'Io vthe above specification of myfcombined clamp and drawer forwell-tubing I have signed my hand, this 2d day of November, 1868.

DANIEL FISHER.

Witnesses: v

WM. J As. Yonne, J oHN J. FISHER.

